Chusetts



D'ec. 2, 1930. D. E. HARDING 1,783,907

' SHANKING MACHINE Filed oct. 11, 192e 2 'Sheets-sheet 1 17706715911afl/uq ci" b' MQ WQZW Dec. 2, 1930. D. E. HAFQDING 1,183,907

SHANKING MACH; NE

Filed oct. 11, 192g 2 sheets-sheet I? J Patented Dec. i 2, 1930VuNrrifznsTA,T115,

PATENT orner. "i,

' nANA E. HARnINe, or MnLnosnlMAssacHUsnTTs, nsslenon TQHARDING ENGINER-i ING COMPANY, or, EAsvr Bos'roiv;VA MASSACHUSETTS, A, conronafrioivouMAssA-V cH-Usn'rms SHANKING MACHINE -1 i f Appnaaon med october ii,192s.: senat Iraanse?. l

,My present 'inventionV relates to leather working machines, and more'particularly to an'improved shankingmachine.

In the manufactureY of leather of the present-processes or machinesemployed to smooth out or take Careof the shanksof f thehides or skins..With them'achines` 410` employment at the present d ay,the Shanks are ofcourse workedupon'but infsuch fa-di'rection as lto stretch :the same out`and'placeflongi; tudinal Wrinkles therein; which wrinkles, as

the `process jof manufacture advances,"become more andv more pronounceduntil, in `the finished skin, the shanks are,'in reality, nothing butwaste leather andn the utilization of the hidesor'skins in the artthecutter in?.`

variably cutsoff the shank and itis thrownV away as waste. Itis a fact,however, that the Shanks contain a considerable area of possiblemechantable leatherand I have, in my present invention, deviseda machinefor processing the hidesl or skins, and particularly the shank '25portion thereof inA such a way that `the shank is smoothed out in twodirections practically perpendicular to the longitudinal axis of thesh'anks. The result Vis that the shank is smoothed out at such a pointin the manufacture of thele'ather from the hides or skins that it is-notthereafter subjected to any dis-r torting actionl on the part of othermachines. Consequently, as the process of making the leather advances,the shank remains smooth and 'in the finished product there is anappreciable amount of visible merchantable leatherwhi'ch isfutilizedinthe art and which will not'beg wasted;

pairfrof spaced `corrugated rolls'rotating jin oppositeA Vdirections,andv associate with said rolls a ',V-shaped. anvil which isautomatically movable into and outof position between the,

two. rollsiabovereferred to. The movement 45 of the anvil into. and out;of position between theprolls is relatively slow and the operator haveampletime 'between each strokefor the accurate'placin'gofthe shankportion of' 11i-:carrying out my invention, I lutilize aVV such away asto smooth out from practically, a cen'trallme extendingthroughoutthelength y y ofthe shankand perpendicular thereto and from 'hides y' i"5 or skins, a considerable Vamount of merchant#V able leather is wastedbecause of the inability sinooth'outany wrinkles that may be in suchVshank'xportion,'and the action ofthe rollers continues Vduring themoving of the anvil into position vbetween such rolls and Vuntil suchanvil moves out ofsuch'position `*The obgect of my invention, therefore,is an improvedshanking machine. s

Infthe accompanying drawings illustrating a preferred embodiment ofmyinventioml "'Ffig. '1' is a side elevation 'i d Fig.`2 is an' endelevation; andV t,

a: table or benchxsupported byllegsllfat a properheight from thefioorand suchtable 10" is ,providedwitha rectangular "slot 12 of Y suitablelengthand breadth;V To the under surface ofthe table 10and adjacent tothe' vends ofthe rectangular slot'12 aresecured, Vby 'bolts 113, bearingbrackets 14 defining parallel guideways in which are slidably mountedthe parallelly arranged bars 15... The bars 15 at theirupper ends aresecured .tou a substantially triangular anvil `16 the apexV of 'theanvil being rounded Land uppermost, aslindicated at 17 To thelower'ends'of the bars 15 is secured a cross bar18 and pivotallyattached to thelbar.18`isthe-upperend of a link 19.. On; the floor ofthe shop or room in which the device is located and vdirectly beneaththe pivotal connectionof the link 19 with the bar 18 is a bearing member20 and pivotally attached to suchV bearing member is the lower `.end ofthe link 21. The links v19an`d 21 are pivotally connected together atg22and also onY such' pivotal connection is pivotally mounted one end `of aconnecting rod 23.` ,The connecting rod 23 is pivotally attached VtoaVc'rank'p'in 24 .ona face pl`ate25, thatisattached to the drivingqsh-aft26 of a motor or 'other prime mover 27; `Rotary movement ofthe shaft 26of the motor 27 will cause ,a reciprocatoryA motion of V'the connectinglrod 23 and, therefore, 'a `movementfof theg links 19and 'i 21 fromthedotted position shown in dot and dash lines, shown in Fig. 1, to thefull lines shown therein, thereby causing a reciprocatory motion of theanvil 16, moving the same from its lowermost to its uppermost position.

l\4ounted on top of the table 10 and secured thereto by bolts 28, is asubstantially U- shaped frame member comprising uprights 29 and atransverse member 30 connecting same at their1 top ends. Secured to thetransverse member 30 by bolts 31 and spaced apart from, though inalinement with each other, are bearings In one of such bearings 32 isrotatably mounted a shaft 33 provided with a bevelled pinion 34 on itsinner end, which meshes with a bevelled pinion 35 on the drive shaft 36of a motor 37, the motor 37, therefore, acting to rotate the shaft 34 inthe proper direction. In the other of the bearings 32 is secured a shaft38. Pivotally mounted on the shafts 33 and 38 and extending downwardlytherefrom so as to terminate at one side of the rectangular slot 13 isan H-shaped frame 40. Alined bearings are formed in the lower end of theH-shaped frame 40 and in such bearings is rotatably mounted; a shaft 41.Secured to the shaftv41 is a corrugated roller 42 and adjacent to Ioneend of such corrugated roll 42 is a cylindrical collar 43 that isadapted to engage with a track 44 on one end of the anvil 16. Secured toone end of the shaft-41 is a grooved pulley 45 that is in alinement withthe grooved pulley 46 secured to the shaft 33 and over the pulleys 45and 46 runs an endless belt 47 and by means of which power istransmitted to the shaft41. Also pivotally mounted on the shafts 33 and38 is a second H frame 48 and at the lower end of such H` frame 48 arealined bearings in which is rotatably mounted a shaft 49. On such shaft49 is mounted a corrugated roll 50 which is located on the opposite sideof the anvil from the corrugated roll 42. Adjacent to one end of theroll 50 and on the shaft 49 is a collar 5l which engages with a track 52on the anvil 16. The relation of the diameters of the rolls 42 and 50with respect to the diameters of the collars 43 and 51 is such that therolls 42 and 50 are always maintained at a fixed distance from thesurface of the anvil 16. Secured to one end of the shaft 49 is a groovedpulley 58 which is in alinement with a grooved pulley 59 secured to theshaft 33 and running over the grooved pulleys 58 and 59 runs an endlessbelt 60 that is crossed so as to insure that the roller 50 will rotatein the opposite direction from the rotation of the roll 42. The H-shapedframes 40 and 48 aredrilled to receive a shaft 53, such shaft beingthreaded on its ends and each threaded end being supplied with a handwheel 54. 'Between' each hand wheel 54 and the corresponding H frame 40or 48 is located a coil spring 55 and by properly adjusting the handwheels 54, the

ipeaeov tension exerted by the springs 55 on the H frames may beadjusted at will. The anvil 16 is adapted to receive the shank portion58 of a hide 57 in the position shown in F ig. 3.

The operation of my improved device is as follows. The tension of thesprings 45 having been adjusted to the right degree and power beingturned on to the motors 27 and 37 the operator will, at a time when theanvil 16 is in its lowermost position, slide the shank 56 of a hide 57over the rectangular opening 12 and in such position that the shank 56will lie along the length of the anvil 16 when such anvil isautomatically raised by the links 19 and 21. As the anvil 16 movesupwardly, it moves between the corrugated rolls 42 an dy 50, which, aswill be obvious, exerts a smoothing out or ironing effect on the shaft56 so as to stretch the same in lines substantially perpendicular to thelongitudinal axis of such shank. The anvil 16 moves upward to its fullextent and then automatically moves downward, and during both suchmovements, the rolls 42 and 50 are acting thereon. When the anvil 16 hasreached its lowermost position, the operator removes the shank 56 fromposition -thereon and repeats the operation above describedindefinitely.

lhile I have necessarily described the preferred embodiment of myinvention somewhat in detail, it is to be understood that I may vary thesize, shape, and arrangement of parts within wide limits withoutdeparting from the spirit of the invention.

Having thus described my invention, what I claim as new is:

1. In an improved shanking machine the combination of a framework, apair of pivotally mounted fra-mes mounted thereon, and extendingdownwardly therefrom, a pair of rolls rotatably mounted in said pivotedframes, means for rotating said rolls in opposite directions and at thesame speed, means for resiliently holding such pivoted frames inoperative position, a wedge-shaped anvil, and means for imparting areciprocatory movement thereto into and out of position with relation tothe corrugated rolls.

2. In a shanking machine, the combination of a pair of corrugated rolls,means for rotatmg the same in opposite directions and at the same speed,a wedge-shaped anvil co-operating with said rolls, means for imparting areciprocatory motion to said anvil to move the same into and out ofoperative position with respect to the rolls, and means associatedtherewith and with the rolls for preventing acltlual engagement of theanvil surface by the ro s.

3. In a shanking machine, the combination of a worktable provided with arectangular perforation, guideways secured to said table at each end ofthe rectangular opening, a triangular anvil movable through saidopening, means on said anvil engaging with said guide- Ways to constrainthe anvil to move in a predetermined path, means for imparting arecprocat'ory movement to said anvil, and corrugated rolls-located abovethetable'anl operatively associated with said anvil. In testimonywhereof, I have signed m name to this specification.

DANA E. HARDING. Y'

